... ABSTRACT Deep shale gas with a burial depth of 3500–5000m became an important area for shale gas development in China. The characteristics of the rock's mechanics and the in situ stress have a significant impact on the drilling and fracturing effects of horizontal wells. Finite element...

... overburden Upstream Oil & Gas cap rock injection pressure overburden pressure operation pressure loss breakdown pressure hydraulic fracturing pi fb test fracture propagation pressure carbonate pressure decline test result situ stress injector well ARMA 19 417 Minimum In Situ Stress...

... ABSTRACT: The understanding of in situ stresses is very important in the oil and gas exploitation. To provide an effective guidance for the field operations including drilling, fracturing and production, the finite element method was employed to model the in situ stresses as well as pore...

... evaluated based on two constitutive models built in FLAC. The simulation shows that the long-term contact pressure will increase from the preset wellbore pressure and eventually reach the in situ stress state, regardless of the mechanical property of the rock and the relative size of the casing annulus...

..., the mud density window for wellbore stability is obtained for different cases of in situ stress. The open-hole extension limit of the horizontal section in an extended reach well can be determined using these results. The results show that when (equation) the mud density window will become narrower...

... ABSTRACT: The in situ stress regime is one of the most important inputs for any subsurface project in civil, mining and petroleum engineering, and combined with soil and/or rock strength generates a geomechanical model, which can be used to predict the ultimate loading that geological...

... and rock mass failure criteria which can be fed back into the static stress model to improve it. In this paper we apply these techniques at Barrick Williams Mine in Canada to an area of the mine where the assumed in situ stress conditions did not match underground observations (damage of boreholes...

... injection well geothermal field injection thermal stress overpressure Geothermal System Reservoir Characterization geothermal reservoir stimulation fracture network situ stress coefficient stress field hydraulic fracture permeability rock matrix fracture gradient ARMA 17-474 Coupling...

.... This paper presents a Discrete Fracture Network (DFN) approach to deep fluid injection into fractured rock. The approach presented combines continuum and discontinuum geomechanics, considering the effect of discrete fracture shear and normal deformation on rock modulus and in situ stress. Stress and pressure...

... charge to overcome the in situ stresses and create fractures in various directions, in contrast to one preferentially aligned fracture formed during hydraulic fracturing. However, it is also well known that shock waves emanating from a detonation can compact the rock and reduce the permeability (Reeves...

... Abstract The aim of this study is to present an analytical probabilistic approach using Monte Carlo Simulation method to estimate the minimum horizontal in situ stress magnitude from a single Leak-off test (LOT) acquired in highly deviated well in a sand interval inside the reservoir section...

... Abstract We present in this paper two examples on two different scales (in borehole and regional), in which stress magnitudes might be influenced by the presence of fractures and faults. Hydraulic fracturing in situ stress measurements conducted in a borehole showed a large fluctuation...

... stability closure construction displacement variation vertical displacement rock mass strength bara storage cavern situ stress stiffness friction angle operational pressure cycle ARMA 14-7418 Impact of Operational Pressure Cycles on the Long-Term Stability of Underground Storage Caverns...

... diagram tectonic strain Reservoir Characterization plasticity pore stress state reservoir geomechanics stress feature Upstream Oil & Gas formula fracture closure fracture breakdown fracture polygon plane breakout horizontal stress equation situ stress principal stress ARMA 14...

... Abstract : Knowledge of the in situ stress state is an essential element of a geomechanics study. Current methods of evaluating in situ stress are based on direct and indirect measurements on the centimeter to kilometer scale. A new core-based technique to estimate in situ stress magnitudes...

... ABSTRACT: This paper presents an ongoing study on the use of borehole breakouts to estimate in situ stresses at depth in a Canadian underground mine. The breakouts were identified using an acoustic televiewer (ATV) probe. Rock samples were tested in laboratory to determine their failure curve...

... ABSTRACT: Delineation of in situ stress field (magnitudes and orientations of the principal stresses) has several applications in petroleum industry such as better drilling management, effects of oil production on stress regime change, stress change effects on permeability, increasing...

... ABSTRACT: Redistribution of in situ stresses so they exceed rock strength leads to yielding of the intact rock material around a tunnel after excavation, causing large plastic deformations often referred to as ground squeezing. This tunneling problem typically occurs during deep tunneling...

... ABSTRACT: Borehole breakouts were commonly observed in the boreholes drilled in unconsolidated deepwater sediments near the Nankai Trough, SW Japan. The use of borehole breakouts enabled us to constrain in situ stress states. While it was straightforward to estimate the stress direction based...

... instability in the roadways some times severely. In the present paper, authors have dealt with a case study of Singareni Collieries Company Limited (India), where the instability in one set of the roadways was found to be due to the major horizontal in situ stress acting perpendicular to the roadways. Based...